package org.totoro.patterns.behavior.mediator;

abstract class AbstractColleague {
    protected int number;

    public int getNumber() {
        return number;
    }

    public void setNumber(int number) {
        this.number = number;
    }

    /**
     * 注意这里的参数不再是同事类，而是一个中介者
     *
     * @param number
     * @param am
     */
    public abstract void setNumber(int number, AbstractMediator am);
}

class ColleagueA extends AbstractColleague {

    @Override
    public void setNumber(int number, AbstractMediator am) {
        this.number = number;
        am.AaffectB();
    }
}

class ColleagueB extends AbstractColleague {

    @Override
    public void setNumber(int number, AbstractMediator am) {
        this.number = number;
        am.BaffectA();
    }
}

abstract class AbstractMediator {
    protected AbstractColleague A;
    protected AbstractColleague B;

    public AbstractMediator(AbstractColleague a, AbstractColleague b) {
        A = a;
        B = b;
    }

    public abstract void AaffectB();

    public abstract void BaffectA();

}

class Mediator extends AbstractMediator {

    public Mediator(AbstractColleague a, AbstractColleague b) {
        super(a, b);
    }

    //处理A对B的影响
    @Override
    public void AaffectB() {
        int number = A.getNumber();
        B.setNumber(number * 100);
    }

    //处理B对A的影响
    @Override
    public void BaffectA() {
        int number = B.getNumber();
        A.setNumber(number / 100);
    }
}

public class Client {
    public static void main(String[] args) {
        AbstractColleague collA = new ColleagueA();
        AbstractColleague collB = new ColleagueB();

        AbstractMediator am = new Mediator(collA, collB);

        System.out.println("==========通过设置A影响B==========");
        collA.setNumber(1000, am);
        System.out.println("collA的number值为：" + collA.getNumber());
        System.out.println("collB的number值为A的10倍：" + collB.getNumber());

        System.out.println("==========通过设置B影响A==========");
        collB.setNumber(1000, am);
        System.out.println("collB的number值为：" + collB.getNumber());
        System.out.println("collA的number值为B的0.1倍：" + collA.getNumber());

    }
}
